Lighting device



FIG. 1 is a side perspective view of the new design for a lighting device;

FIG. 2 is a left side elevational view of the lighting device shown in FIG. 1;

FIG. 3 is a right side elevational view of the lighting device shown in FIG. 1;

FIG. 4 is a front elevational view of the lighting device shown in FIG. 1;

FIG. 5 is a rear elevational view of the lighting device shown in FIG. 1;

FIG. 6 is an enlarged top plan view of the lighting device shown in FIG. 1; and,

FIG. 7 is an enlarged bottom plan view of the lighting device shown in FIG. 1.

The broken lines shown in the drawings illustrate environment of the lighting device that form no part of the claimed design. 

The ornamental design for a lighting device, as shown and described. 